IF y=cos^2((3x)/2)-sin^2((3x)/2),then(d^...

IF `y=cos^2((3x)/2)-sin^2((3x)/2)`,then`(d^2y)/(dx^2)`is

A

`- 3sqrt(1-y^2)`

B

9y

C

`-9y`

D

`3sqrt(1-y^2)`

Verified by Experts

The correct Answer is:

C

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